[PATCH] Allow the frontend to reserve x18 on AArch64

[Andrew Turner]

On Tue, 20 Jan 2015 10:13:18 -0800
Tim Northover <t.p.northover at gmail.com> wrote:

> Hi Andrew,
> 
> On 20 January 2015 at 09:59, Andrew Turner <andrew at fubar.geek.nz>
> wrote:
> > The attached patch allows the x18 platform register on AArch64 to be
> > reserved by users of llvm.
> 
> This looks reasonable, modulo one comment on the test:
> 
> +; CHECK-RESERVE-X18-NOT: ldr fp
> +; CHECK-RESERVE-X18-NOT: ldr x18
> +; CHECK-RESERVE-X18: Spill
> +; CHECK-RESERVE-X18-NOT: ldr fp
> +; CHECK-RESERVE-X18-NOT: ldr x18
> +; CHECK-RESERVE-X18: ret
> 
> These are identical to the DARWIN checks, aren't they? If so, they
> should probably be combined (likely by renaming to CHECK-RESERVE-X18
> for both platforms).

The attached updated patch merges these checks to both use
CHECK-RESERVE-X18. If you're happy with it can someone commit it for me?

Andrew
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